.NET Maui FileStream

Question

I'm converting an UWP app to a .NET Maui, but having an issue with FileStream. Here is my working code in the UWP app:

string binaryFile="Resources\Images\alpha.jpg"

 private async static Task GetBinaryStream(string binaryFile)  
        {  
            var storageFile = await Package.Current.InstalledLocation.GetFileAsync(binaryFile);  
            var storageStream = await storageFile.OpenSequentialReadAsync();  
            return storageStream.AsStreamForRead();  
        }

I've tried multiple implementations, but I can't find an alternative to the line:

var storageStream = await storageFile.OpenSequentialReadAsync();

How do I replicate the UWP code to work with Maui?

Accepted Answer

Hello,

You need to use File system helpers in MAUI to get the Stream from files on Windows platform.

Referring to this documentation, you could find the following content:

FileSystem.OpenAppPackageFileAsync
Files that were added to the project with the Build Action of MauiAsset can be opened with this method. .NET MAUI projects will process any file in the Resources\Raw folder as a MauiAsset.

Therefore, you need to add in your project file at first, then you could use the following code to get Stream:

   // binaryFile = "Resources\Images\dotnet_bot.svg"  
   private async static Task GetBinaryStream(string binaryFile)  
   {  
       // Read the source file  
       using Stream fileStream = await FileSystem.Current.OpenAppPackageFileAsync(binaryFile);  
       return fileStream;  
   }

Best Regards,

Alec Liu.

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.NET Maui FileStream

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